package org.example.common.core.utils;



import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.example.common.core.constants.JwtConstants;


import java.util.Map;


public class JwtUtils {
    /**
     * ⽣成令牌
     * @param claims 数据
     * @param secret 密钥
     * @return 令牌
     */
    public static String createToken(Map<String, Object> claims, String secret) {
        String token = Jwts.builder()
                .setClaims(claims)
                .signWith(SignatureAlgorithm.HS512, secret)
                .compact();
        return token;
    }
    /**
     * 从令牌中获取数据
     * @param token 令牌
     * @param secret 密钥
     * @return 数据
     */
    public static Claims parseToken(String token, String secret) {
        return Jwts.parser()
                .setSigningKey(secret)
                .parseClaimsJws(token)
                .getBody();
    }


    public static String getUserKey(Claims claims) {
        return toStr(claims.get(JwtConstants.LOGIN_USER_KEY));
    }

    public static String getUserId(Claims claims) {
        return toStr(claims.get(JwtConstants.LOGIN_USER_ID));
    }

    private static String toStr(Object o) {
        if (o == null) {
            return "";
        }
        return o.toString();
    }

}
